The RM-P2 system enables virtually any saddle to carry a rear mounted bottle out of the wind. Using the innovative Elliptical Arch Clamp design most saddles are compatible. The Arch allows for 14 degrees of adjustment for the cage to slide under saddles with a transition tab or those that have the rail clamps conforming to different saddle rail angles. To add to the versatility this system can run 1 or 2 cages to customize for training or racing. 1 vise kage included. Weight: 93g